Fuel-heating device for hydrocarbon motors



C, R. SHORT. FUEL HEATING DEVICE FOR HYDROCARBON MOTORS. APPLICATION FILED-DEC. 10, 1917.

1,43 1,335. Patented Oct. 10, 19221 .INVENTOR.

CH/IRLES 2?. SHORT, BY

74TTOPNEK ll atented @ct. Lid, lihfizl Thai? CHARLES R. SHGRT, 0F DETRQIT, MIKZHIGAN, ASSIGNDR T0 GlEhFEl'i/AL EEOTQRS 0633G- M'E'IOI Y, GEE DETRUIT, MIQHIGAH, A. CQRPGRATEQEK or nnnewaan.

FUTEL-TEXEATENG DE'VZCE EBB EYDRC CARBQN MOTURS.

. Application filed Beceuzoer lo, 193?.

To all whom it may concern Be it known that I, (kiARLnsR. SHORT, a subject of the Kin of Great Britain, and resident of Detroit, Wayne County, State of Michigan, have invented certain new and useful Improvements in Fuel-Heating Devices for Hydrocarbon Motors, of which the following is a specification.

This invention relates to improvements in fuel heating devices for hydrocarbon motors. and more particularly to fuel heating devices wherein the combustible mixture supplied to the engine is heated by the exhaust gases of the engine.

It has become generally known in connection with the carbureting apparatus of hydrocarbon motors that advantages are obtained, particularly in cold weather and also when employing a liquid hydrocarbon of comparatively low volatility by heating the gas induction pipe; and many forms of exhaust jackets have been proposed, but have been Wanting in etliciency and consistency of action due to their manner of formation about the intake manifold in the form of exhaust gas jackets, or to the manner of connecting such exhaust gas intake manifold jackets with the exhaust manifold for heating purposes.

(lne of the objects of this invention is to provide an efficient fuel heating device, of simple and durable construction for hydrocarbon motors.

Another object of the invention is to equalize the heat as applied to a gas induction pipe of branched form.

Another object of the invention is to pro vide a means for readily regulating the amount of heat applied to the induction 1 e. p inother object of the invention is to pro vide a means for positively inducing a circulation of heated gases about the intake manifold as desired.

Another object of the invention is to pro vide asimple and eflicient coupling between the exhaust manifold and the intake manifold heating jacket.

These and other objects will more clearly appear from the following description taken in connection with the accompanyin drawings, which form a part of this speci cation, and in which:

Figure 1 is a side elevation of a block of Serial misses-ta.

six hydrocarbon motor cylinders, showing the invention applied thereto.

l igure 2 is an enlarged vertical sectional view on the line (2-2) in Figure'1,showing the intake. and exhaust manifolds.

Figure 3 is an enlarged longitudinal sectional view of the exhaust jacket suction duct, showing the regulating valve.

eierring to the drawing, 10 shows a block of hydrocarbon motor cylinders having the customary overhead valve operating mechanism 11, the gas intake ports 12, and exhaust ports 13, though it will be understood that or particular arrangement of intake and exhaust ports is unimportant and the inven# tion as hereinafter described may be applied to any arrangement of motor cylinders without departing from the spirit or scope thereof.

An exhaust manifold 14 is secured to the side of the motor over the exhaust ports 13, as by the bolts 15, said exhaust manifold extending along the motor slightly below said ports and terminating in the common exhaust outlet 16, and having the several upturned branches 1'? communicating with said ports 13. The exhaust manifold 14 also has formed intermediate its length and preferably on the under side thereof an outlet port 18, bridged by a spider 19 for supporting the central boss 20.

A gas intake manifold the various parts of which are designated by the reference numeral 21 is secured along the side of the motor as by means of bolts 22 said manifold having an intake port 23 at the lower end of a vertically extending pipe or branch, and three outlet branches the ends of which are secured to the motor so as to supply gas to the intake ports 12 thereof. The central portion 24 of the intake manifold where the vertical and branching portions aforesaid merge is provided with a heating section or passage 25 which extends through or across the central portion. Said central portion is surrounded by a jacket 26 the exterior wall of which merges with the walls of the several branches of said manifold, and the two ends of the heating passage 25 communicate with the space enclosed by said jacket thereby providing a construction whereby the mixture passingthrough the manifold is heated at the point where it is deflected to the particular form of motorv the 'several cylinders of the engine, and uniform heating is secured by a single centrally arranged heating device.

The jacket 26 is provided with a rearwardly extending elbow 27 the end of which is upwardly turned and which end terminates in an inlet port 28 adapted to register with the outlet port 18 of the exhaust manifold and said jacket is also provided with an outlet duct or passage 29 leading from the side thereof opposite the inlet port 28; so that exhaust gases may flow into the heating jacket. through the inlet port 28, then both around the central portion 25 where the branches of the inlet manifold merge withone another and through the heating passage 25 which extends across said central portion, and then out from the heating jacket through the outlet passage or duct 29, as will hereinafter appear.

The elbow 27 of the intake manifold is secured to the exhaust manifold as by a bolt 30 extending through the elbow and into a corresponding threaded orifice in the boss 20 of said exhaust manifold. A compression coupling comprising a nipple 3]. formed of a length of tul.e having a compressible corrugation 32 encircling the same. is fitted in the opening in the elbow 27 and the outlet port of the exhaust manifold with the corrugation 32 between said elbow and said exhaust manifold. whereby the bolt 30 may be used to draw the elbow towards the intake manifold and tightly compress the corrugation 32 to form a gas tight joint and maintain the nipple in proper position the correct distance in each of the parts which it joins. To further finish the joint a gasket 33 made of a compressible material such as asbestos is arranged around the compression coupling between the faces of the elbow and the exhaust manifold, and the entire joint may be well tightened down with out danger of displacing the coupling menu her or having a part of the gasket enter the ports being joined or causing an unequal compression on any part thereof.

The foregoing parts complete an exhaust jacket of compact simple and neat construction about. the intake, but it is essential to the efiicicnt operation of the same that the exhaust gases passing through the jacket be regulated with a degree of certainty to opcrate in. direct ratio with the amount of gas passing through the induction pipe, and for this purpose the outlet pipe 29 of the jacket is connected as by a flexible duct 34 with a no7. zle 35, said nozzle extending through a suitable opening in the exhaust manifold adjacent to the common outlet 16 thereof, and being turned in the direction of flow of gases in said manifold outlet as at 36, whereby a suction effect is produced in said nozzle and a artial vacuum created in the duct 34 and acket .26. whereby exhaust gases will be induced to flow from the exhaust manifold into said jacket directly in proportion to the amount of exhaust gas passing out the common outlet 16 of the exhaust manifold. The suction effect of the nozzle 36 may be regulated according to climatic conditions as by a valve 37 of the butterfly type arranged in the outlet pipe 29 of the jacket 26 and referably having the stem 38 thereof provi ed with a spring 39 arranged to serve as a handle for the valve stem and passing over a ridge 40 on the outlet pipe w ereby when the spring handle is turned to any desired position to set the valve, it will be so retained.

A carburetor 41 of any desired type is shown as connected to the lower end or intake port 23 of the intake manifold whereby a supply of explosive gas is fed to said manifold as customary.

While I have described and will claim the preferred embodiment of my invention, it will be obvious to those skilled in the art that many modifications and changes may be made without departing from the scope of the invention.

Having thus described my invention, what I claim and desire to secure by Letters Patcut is 1. In a heating device for use with hydrocarbon motors, an inlet manifold having a 95 plurality of branches leading to the inlet portsof a motor. a heating device located at the point where said branches merge with one another and the construction of which is such that exhaust gases may flow both around and throu h said inlet manifold; an exhaust manifolt having a plurality of branches leading from the exhaust ports of the engine and merging into a single exhaust conduit; means for providing a passage be- 105 tween the central portions of said manifolds through which exhaust gases may flow from said exhaust manifold into said heating device; and a conduit leading from said heating device to the exhaust conduit and discharging thereinto.

2. In a heating device for use with hydrocarbon motors, an intake manifold having a plurality of branches leading from a common point to the inlet ports of the engine; a heating jacket surrounding the portion of said intake manifold at the place where said branches merge with one another, and which heating jacket includes an internal passage extending through said inlet conduit; an ex- 0 haust manifold having branches leading from the exhaust ports of the motor into a single exhaust conduit; means for connecting said two manifolds together and for providing a passage at the joint between 125 them through which exhaust gases may flow from said exhaust manifold into said heating jacket; and a conduit leading from said heating jacket to and discharging into iaid exhaust conduit. 130

. 3. In a heating device for use with hydrocate' with the exhaust ports of the motor, a gas outlet port intermediate its length, and a single exhaust conduit through which exhaust gases may flow; an inlet manifold formed separate from said exhaust manifold and having a vertically extending inlet pipe, a plurality of branches extending from said pipe and adapted to communicate with the inlet ports of the motor, a heating jacket surrounding the portion of said manifold at and adaptedIto communicate with the outletport aforesaid in said exhaust manifold;

which said inlet pipe and branches merge with one another, and an elbow communicating with said jacket and open at one end means for securing said elbow to said exhaust manifold; and a conduit leading from said heating jacket and discharging into said exhaust conduit in the direction in which the exhaust gas flows therethrough whereby the flow of gas along said exhaust conduit will induce a flow through said elbow, said heating jacket and along said last mentioned conduit and into said exhaust conduit.

4. In a heating device for use withchydrocarbon motors, separate and independently formed inlet and exhaust manifolds each having a plurality of branches adapted to be connected with the inlet and exhaust ports of the motor; an inlet pipe leading into said inlet manifold; an exhaust conduit leading from said exhaust manifold; a heat ing jacket associated with said inlet maniing from said jacket.

fold and having an elbow through which exhaust gases may flow through an opening provided in said exhaust manifold and into said jacket; means for securing said elbow to said exhaust manifold; means for providing a yieldable joint between the meeting surfaces of said elbow and said exhaust manlfold; and a conduit leading from said heating jacket to and discharging into said exhaust conduit.

5. In a heating device for use with hydrocarbon motors, separate and independently formed inlet and exhaust manifolds each having a plurality of branches adapted to be connected with the inlet and exhaust ports of the motor; an inlet pipe leading into said inlet manifold; an exhaust conduit leadexhaust manifold; a heating jacket associated with said inlet and having an elbow through which exhaust gases may flow through'an opening provided in said exhaust and into said jacket, means for securing said elbow to said exhaust; means for providing a yieldable joint between the meeting surfaces of said elbow and said exhaust manifold; and a flexible conduit leading from said .heatin jacket to and .discharging into said ex aust conduit in the direction in which the exhaust gases flow therethrough whereby a suction effect will be produced along said conduit and a flow of exhaust gases induced from said exhaust manifold into and through said heating Intestimony whereof I affix my signature.

CHARLES R. SHORT. 

